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Sökning: WFRF:(Berglund Per) > Övrigt vetenskapligt

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  • Gaines, Hans, et al. (författare)
  • Six-week follow-up after HIV-1 exposure : a position statement from the Public Health Agency of Sweden and the Swedish Reference Group for Antiviral Therapy
  • 2016
  • Ingår i: INFECTIOUS DISEASES. - Taylor & Francis. - 2374-4235. ; 48:2, s. 93-98
  • Forskningsöversikt (övrigt vetenskapligt)abstract
    • In 2014 the Public Health Agency of Sweden and the Swedish Reference Group for Antiviral Therapy (RAV) conducted a review and analysis of the state of knowledge on the duration of follow-up after exposure to human immunodeficiency virus (HIV). Up until then a follow-up of 12 weeks after exposure had been recommended, but improved tests and new information on early diagnosis motivated a re-evaluation of the national recommendations by experts representing infectious diseases and microbiology, county medical officers, the RAV, the Public Health Agency, and other national authorities. Based on the current state of knowledge the Public Health Agency of Sweden and the RAV recommend, starting in April 2015, a follow-up period of 6 weeks after possible HIV-1 exposure, if HIV testing is performed using laboratory-based combination tests detecting both HIV antibody and antigen. If point-of-care rapid HIV tests are used, a follow-up period of 8 weeks is recommended, because currently available rapid tests have insufficient sensitivity for detection of HIV-1 antigen. A follow-up period of 12 weeks is recommended after a possible exposure for HIV-2, since presently used assays do not include HIV-2 antigens and only limited information is available on the development of HIV antibodies during early HIV-2 infection. If pre- or post-exposure prophylaxis is administered, the follow-up period is recommended to begin after completion of prophylaxis. Even if infection cannot be reliably excluded before the end of the recommended follow-up period, HIV testing should be performed at first contact for persons who seek such testing.
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  • Ahlström, Göran, et al. (författare)
  • Världsutställningar och teknikspridning 1850 - 1914
  • 2006
  • Ingår i: Historiska perspektiv på tekniköverföring 1800 - 2000. - Teknik och samhälle. Chalmers tekniska högskola. Göteborg.
  • Bokkapitel (övrigt vetenskapligt)
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  • Anderson, Mattias, et al. (författare)
  • Chemoenzymatic amination of alcohols by combining oxidation catalysts with transaminases in one pot
  • ????
  • Annan publikation (övrigt vetenskapligt)abstract
    • Chemoenzymatic methods for the amination of alcohols have been developed. The reactions were performed in a one-pot two-step fashion, where the alcohol starting material was first oxidized to the corresponding carbonyl compound and then subsequently converted to the amine product with an enzymatic system based on an amine transaminase. The enzyme system was able to operate in a water/organic solvent two-phase system in the presence of either a heterogeneous palladium(0) catalyst or a homogeneous copper(I) catalyst. High conversions to the product amines were achieved for a range of substituted benzyl alcohols and similar compounds, but unfortunately the use of aliphatic alcohols resulted in lower conversions and secondary alcohols could not be converted to the corresponding amines with this methodology.
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  • Berglund, Björn, et al. (författare)
  • Detection and Quantification of Antibiotic Resistance Genes in Stångån River, Sweden
  • 2014
  • Annan publikation (övrigt vetenskapligt)abstract
    • Antibiotic resistant bacteria are an emerging global problem which threatens to undermine important advances in modern medicine. It is becoming increasingly clear that the dynamics of antibiotic resistance are not confined to clinical settings. The environment is likely to play an important role in dissemination of antibiotic resistance genes from and to both environmental and pathogenic bacteria. Wastewater treatment plants accumulate both chemical and biological waste from the surrounding urban milieu and have therefore been viewed as potential hotspots for dissemination and development of antibiotic resistance. To assess the effect of wastewater effluent on a river which flows through a Swedish city, sediment and water samples were collected from Stångån River, both upstream and downstream of an adjacent wastewater treatment plant over three months. Seven antibiotic resistance genes and the integrase gene on class 1 integrons were quantified in the collected sediment using realtime PCR. Furthermore, liquid chromatography-mass spectrometry was used to assess the abundance of ten different antibiotics in the water phase of the samples. The results showed an increase in ARGs and integrons downstream of the wastewater treatment plant as compared to upstream. The measured concentrations of antibiotics were low in the water samples from Stångån River, suggesting that selection for antibiotic resistance genes did not occur in the surface water. Instead, the downstream increase in antibiotic resistance genes is likely to be due to accumulation of genes present in the treated effluent discharged from the wastewater treatment plant.
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10.
  • Berglund, Johan, et al. (författare)
  • Measuring strategies for smooth tool steel surfaces
  • 2008
  • Ingår i: Proceedings : January 28th and 29th, 2008, Germany, Chemnitz = XII. Internationales Oberflächenkolloquium. - Aachen : Shaker Verlag. - 978-3-8322-6912-8 - 3-8322-6912-6 ; s. 110-119
  • Konferensbidrag (övrigt vetenskapligt)abstract
    • Comparisons between different measuring strategies were made on three types of smooth tool steel surfaces. Three replica materials were tested to study possibilities within replication techniques. An optical interferometer as well as a mechanical stylus was used to evaluate the surfaces. The results showed that the tested replica materials generated good representations of both the form and the surface roughness (Sq > 300 nm). The evaluated surfaces were quite homogeneous, thus, few measurements are needed to get representative results. However, it was found that caution must be taken regarding manually polished surfaces which can be less homogenous and therefore require more measurements to get representative results.
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